2ahk: Difference between revisions
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== | ==Crystal structure of the met-form of the copper-bound Streptomyces castaneoglobisporus tyrosinase in complex with a caddie protein obtained by soking in cupric sulfate for 6 months== | ||
[[2ahk]] is a 2 chain structure with sequence from [ | <StructureSection load='2ahk' size='340' side='right'caption='[[2ahk]], [[Resolution|resolution]] 1.71Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2ahk]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_castaneoglobisporus Streptomyces castaneoglobisporus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2AHK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2AHK FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.71Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CU:COPPER+(II)+ION'>CU</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2ahk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ahk OCA], [https://pdbe.org/2ahk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ahk RCSB], [https://www.ebi.ac.uk/pdbsum/2ahk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ahk ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q83WS2_9ACTN Q83WS2_9ACTN] | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ah/2ahk_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2ahk ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
At high resolution, we determined the crystal structures of copper-bound and metal-free tyrosinase in a complex with ORF378 designated as a "caddie" protein because it assists with transportation of two CuII ions into the tyrosinase catalytic center. These structures suggest that the caddie protein covers the hydrophobic molecular surface of tyrosinase and interferes with the binding of a substrate tyrosine to the catalytic site of tyrosinase. The caddie protein, which consists of one six-strandedbeta-sheet and one alpha-helix, has no similarity with all proteins deposited into the Protein Data Bank. Although tyrosinase and catechol oxidase are classified into the type 3 copper protein family, the latter enzyme lacks monooxygenase activity. The difference in catalytic activity is based on the structural observations that a large vacant space is present just above the active center of tyrosinase and that one of the six His ligands for the two copper ions is highly flexible. These structural characteristics of tyrosinase suggest that, in the reaction that catalyzes the ortho-hydroxylation of monophenol, one of the two Cu(II) ions is coordinated by the peroxide-originated oxygen bound to the substrate. Our crystallographic study shows evidence that the tyrosinase active center formed by dinuclear coppers is flexible during catalysis. | |||
Crystallographic evidence that the dinuclear copper center of tyrosinase is flexible during catalysis.,Matoba Y, Kumagai T, Yamamoto A, Yoshitsu H, Sugiyama M J Biol Chem. 2006 Mar 31;281(13):8981-90. Epub 2006 Jan 25. PMID:16436386<ref>PMID:16436386</ref> | |||
<ref | |||
[[Category: | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
<div class="pdbe-citations 2ahk" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Tyrosinase 3D structures|Tyrosinase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Streptomyces castaneoglobisporus]] | [[Category: Streptomyces castaneoglobisporus]] | ||
[[Category: Kumagai | [[Category: Kumagai T]] | ||
[[Category: Matoba | [[Category: Matoba Y]] | ||
[[Category: Sugiyama | [[Category: Sugiyama M]] | ||
[[Category: Yamamoto | [[Category: Yamamoto A]] | ||
[[Category: Yoshitsu | [[Category: Yoshitsu H]] | ||
Latest revision as of 11:17, 25 October 2023
Crystal structure of the met-form of the copper-bound Streptomyces castaneoglobisporus tyrosinase in complex with a caddie protein obtained by soking in cupric sulfate for 6 monthsCrystal structure of the met-form of the copper-bound Streptomyces castaneoglobisporus tyrosinase in complex with a caddie protein obtained by soking in cupric sulfate for 6 months
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedAt high resolution, we determined the crystal structures of copper-bound and metal-free tyrosinase in a complex with ORF378 designated as a "caddie" protein because it assists with transportation of two CuII ions into the tyrosinase catalytic center. These structures suggest that the caddie protein covers the hydrophobic molecular surface of tyrosinase and interferes with the binding of a substrate tyrosine to the catalytic site of tyrosinase. The caddie protein, which consists of one six-strandedbeta-sheet and one alpha-helix, has no similarity with all proteins deposited into the Protein Data Bank. Although tyrosinase and catechol oxidase are classified into the type 3 copper protein family, the latter enzyme lacks monooxygenase activity. The difference in catalytic activity is based on the structural observations that a large vacant space is present just above the active center of tyrosinase and that one of the six His ligands for the two copper ions is highly flexible. These structural characteristics of tyrosinase suggest that, in the reaction that catalyzes the ortho-hydroxylation of monophenol, one of the two Cu(II) ions is coordinated by the peroxide-originated oxygen bound to the substrate. Our crystallographic study shows evidence that the tyrosinase active center formed by dinuclear coppers is flexible during catalysis. Crystallographic evidence that the dinuclear copper center of tyrosinase is flexible during catalysis.,Matoba Y, Kumagai T, Yamamoto A, Yoshitsu H, Sugiyama M J Biol Chem. 2006 Mar 31;281(13):8981-90. Epub 2006 Jan 25. PMID:16436386[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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